package j2025.j03;

/**
 * @Author 猫大仙
 */
public class j0313 {
    public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
        ListNode newHead = new ListNode(-1);
        ListNode cur = newHead;
        while(list1!=null && list2!=null){
            if(list1.val<list2.val) {
                cur.next = list1;
                list1 = list1.next;
            }else {
                cur.next = list2;
                list2 = list2.next;
            }
            cur = cur.next;
        }
        while(list1!=null){
            cur.next = list1;
            list1 = list1.next;
            cur = cur.next;
        }
        while(list2!=null){
            cur.next = list2;
            list2 = list2.next;
            cur = cur.next;
        }
        return newHead.next;
    }
}
